A set of violin icons available in the following sizes: 32×32, 64×64, 128×128, 256×256 and 512×512 pixels.
Music Icon Pack
There are 74 different icons included in this set which includes guitars, speakers, boomboxes or microphones of which each element comes with a variety of bold colors and customized versions. Download Source
Simple iTunes Icon
A set of itunes icons available in .ico and .png file formats in 256×256 pixels. Download Source